CN116624972A - Refrigerant leakage protection method and device, air conditioner and computer readable storage medium - Google Patents
Refrigerant leakage protection method and device, air conditioner and computer readable storage medium Download PDFInfo
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- CN116624972A CN116624972A CN202310772460.5A CN202310772460A CN116624972A CN 116624972 A CN116624972 A CN 116624972A CN 202310772460 A CN202310772460 A CN 202310772460A CN 116624972 A CN116624972 A CN 116624972A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 251
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000008859 change Effects 0.000 claims abstract description 24
- 238000004590 computer program Methods 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 13
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of air conditioners, and provides a refrigerant leakage protection method, a device, an air conditioner and a computer readable storage medium, wherein the refrigerant leakage control method is used for the air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, a compressor, a four-way reversing valve and a first heat exchanger which are sequentially communicated are arranged in the outdoor unit, a second heat exchanger and an inner fan are arranged in the indoor unit, and the refrigerant leakage protection method comprises the following steps: acquiring the refrigerant leakage concentration of the indoor unit; controlling to raise the wind shield of the inner fan according to the condition that the refrigerant leakage concentration of the indoor unit is larger than or equal to a preset leakage alarm threshold value and the refrigerant leakage change rate of the indoor unit is larger than the preset threshold value; and according to the operation mode of the air conditioner, controlling to stop conveying the refrigerant to the first heat exchanger, and controlling the first heat exchanger to convey the refrigerant to the compressor or the second heat exchanger. By adopting the technical scheme, the refrigerant leakage control device can be used for rapidly discharging when the refrigerant leakage occurs in the indoor unit of the air conditioner, and the risk of ignition or explosion when the refrigerant leakage concentration exceeds the safety limit value is reduced.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a refrigerant leakage protection method and device, an air conditioner and a computer readable storage medium.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
In the related art, HC-based refrigerants such as R290 and R32 commonly used in an air conditioner belong to combustible gases, and if refrigerant in an indoor unit of the air conditioner leaks, and the refrigerant is discharged out in time, the leakage concentration of the refrigerant is continuously increased, ignition or explosion is easy to occur, and the use safety of a user is affected. Therefore, necessary measures are needed to quickly discharge the refrigerant leaked by the indoor unit of the air conditioner, so that the risk of explosion or ignition when the refrigerant leakage occurs in the air conditioner is reduced.
Disclosure of Invention
The application aims to provide a refrigerant leakage protection method, a device, an air conditioner and a computer readable storage medium, which are used for rapidly discharging when refrigerant leakage occurs in an indoor unit of the air conditioner, so that the risk of ignition or explosion is reduced. The aim is achieved by the following technical scheme:
the first aspect of the present application provides a refrigerant leakage protection method for an air conditioner, the air conditioner includes an outdoor unit and an indoor unit, the outdoor unit is provided with a compressor, a four-way reversing valve and a first heat exchanger which are sequentially communicated, the indoor unit is provided with a second heat exchanger and an inner fan, the first heat exchanger is communicated with the second heat exchanger through a first refrigerant pipeline, the second heat exchanger is communicated with the compressor through a second refrigerant pipeline and the four-way reversing valve, the first refrigerant pipeline is provided with the throttling element, the second refrigerant pipeline is provided with an electromagnetic valve, and the refrigerant leakage protection method includes:
acquiring the refrigerant leakage concentration of the indoor unit;
controlling to raise the wind shield of the inner fan according to the condition that the refrigerant leakage concentration of the indoor unit is larger than or equal to a preset leakage alarm threshold value and the refrigerant leakage change rate of the indoor unit is larger than the preset threshold value;
and controlling to stop conveying the refrigerant to the first heat exchanger according to the operation mode of the air conditioner, and controlling the first heat exchanger to convey the refrigerant to the compressor or the second heat exchanger.
According to the refrigerant leakage protection method of the air conditioner, when the refrigerant leakage concentration of the indoor unit reaches the preset leakage alarm threshold value, and the change rate of the refrigerant leakage concentration of the indoor unit is larger than the preset change threshold value, the refrigerant leakage concentration of the indoor unit in unit time is larger than the refrigerant concentration discharged from the indoor unit in unit time, that is, the refrigerant leakage concentration in the indoor unit is caused to rise too fast, the rotating speed of the inner fan of the indoor unit is lower, the refrigerant leakage concentration of the indoor unit reaches the safety limit value, at the moment, the rotating speed of the inner fan is increased by lifting the wind shield of the inner fan, so that the indoor speed of the refrigerant in the indoor unit can be increased, the refrigerant leakage concentration in the indoor unit is reduced rapidly, the indoor space is larger than the space of the indoor unit, the refrigerant of the indoor unit can be scattered rapidly after entering the indoor space, the refrigerant leakage concentration of the indoor unit is limited, and the indoor refrigerant concentration cannot exceed the safety limit value. Meanwhile, according to the operation mode of the air conditioner, the refrigerant is stopped to be conveyed to the second heat exchanger in the indoor unit by controlling, and the refrigerant is conveyed to the compressor or the first heat exchanger by controlling the second heat exchanger, so that the refrigerant is stopped to be supplied to the indoor unit, the refrigerant in the indoor unit can be directly conveyed back to the compressor or returned to the compressor after being conveyed to the first heat exchanger, the concentration of the refrigerant in the indoor unit is reduced, and the risk of ignition or explosion caused when the leakage concentration of the refrigerant in the indoor unit exceeds a safety limit value is reduced.
For example, when the air conditioner is in a cooling mode and the refrigerant flow direction is compressor-first heat exchanger-second heat exchanger-compressor, the first refrigerant pipeline between the first heat exchanger and the second heat exchanger is controlled to be disconnected so as to stop conveying the second heat exchanger, and the second heat exchanger is controlled to continuously convey the refrigerant to the compressor, so that the concentration of the refrigerant in the indoor unit is reduced. For another example, the air conditioner is in a heating mode, at this time, the refrigerant flow direction is a compressor, a second heat exchanger, a first heat exchanger and a compressor, and then the compressor is controlled to stop conveying the refrigerant to the second heat exchanger, and a refrigerant pipeline between the second heat exchanger and the first heat exchanger is controlled to keep a passage, so that the refrigerant in the indoor unit can be conveyed to the outdoor unit, the refrigerant concentration of the indoor unit is reduced, and the risk of ignition or explosion caused when the refrigerant leakage concentration of the indoor unit exceeds a safety limit can be reduced.
In addition, the refrigerant leakage protection method of the air conditioner provided by the application can also have the following additional technical characteristics:
in some embodiments of the present application, the step of controlling to stop the supply of the refrigerant to the first heat exchanger and controlling the first heat exchanger to supply the refrigerant to the compressor or the second heat exchanger according to the operation mode of the air conditioner includes:
and according to the air conditioner in the refrigeration mode, controlling to close the throttling piece and controlling the compressor to operate at a preset frequency.
In some embodiments of the present application, the step of controlling to stop the supply of the refrigerant to the first heat exchanger and controlling the first heat exchanger to supply the refrigerant to the compressor or the second heat exchanger according to the operation mode of the air conditioner includes:
acquiring the ambient temperature of the air conditioner according to whether the air conditioner is in a heating mode or a standby mode;
and controlling the outdoor unit to switch to a refrigeration mode according to the fact that the ambient temperature of the air conditioner is greater than or equal to a preset ambient temperature threshold value, and controlling the throttling piece to be closed and controlling the compressor to operate at a preset frequency.
In some embodiments of the present application, the refrigerant leakage protection method of an air conditioner further includes:
and controlling to switch the four-way reversing valve according to the condition that the ambient temperature is smaller than the preset ambient temperature threshold value, and closing the compressor.
In some embodiments of the present application, the refrigerant leakage protection method further includes:
and controlling to close the compressor and closing the electromagnetic valve according to the fact that the refrigerant leakage concentration of the indoor unit is reduced to be smaller than a preset leakage alarm threshold value.
In some embodiments of the present application, the refrigerant leakage protection method further includes:
acquiring the return air pressure of the compressor;
and controlling to close the compressor and closing the electromagnetic valve according to the fact that the return air pressure of the compressor is smaller than a preset pressure value.
In some embodiments of the application, the step of controlling the raising of the wind shield of the inner blower comprises:
and controlling the wind gear of the inner fan to be switched to the upper limit value of the wind gear.
In some embodiments of the present application, the inner fan is controlled to maintain the current wind gear according to the change rate of the refrigerant leakage concentration of the indoor unit being smaller than a preset change threshold.
A second aspect of the present application provides a control device for an air conditioner, including:
a memory and a processor, the memory storing a computer program which, when executed by the processor, implements the steps of the method for adjusting the wind level of an air conditioner according to any one of the embodiments of the first aspect.
A third aspect of the present application provides an air conditioner, comprising:
the outdoor unit is internally provided with a compressor, a four-way reversing valve and a first heat exchanger which are sequentially communicated;
the indoor unit is internally provided with a second heat exchanger and an inner fan, the first heat exchanger is communicated with the second heat exchanger through a first refrigerant pipeline, the second heat exchanger is communicated with the compressor through a second refrigerant pipeline and the four-way reversing valve, the first refrigerant pipeline is provided with a throttling piece, and the second refrigerant pipeline is provided with an electromagnetic valve;
the refrigerant sensor is arranged in the indoor unit; and
the control device of the air conditioner according to the second aspect is electrically connected to the compressor, the four-way reversing valve, the inner fan, the throttle, the solenoid valve, and the refrigerant sensor, and is configured to implement the refrigerant leakage protection method of the air conditioner according to any one of the first aspect when executing a computer program.
A fourth aspect of the present application proposes a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for adjusting a wind level of an air conditioner according to any one of the embodiments of the first aspect.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 schematically illustrates a structural diagram of an air conditioner provided according to some embodiments of the present application;
fig. 2 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 3 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 4 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 5 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 6 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 7 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 8 schematically illustrates a flow chart of a refrigerant leakage protection method of an air conditioner according to some embodiments of the present application;
fig. 9 schematically shows a block diagram of a control device according to some embodiments of the present application.
The reference numerals are as follows:
100. an air conditioner; 200. a control device;
10. an outdoor unit; 20. an indoor unit; 30. a first refrigerant line; 40. a second refrigerant line; 50. a refrigerant sensor; 60. a temperature sensor;
11. a compressor; 12. a four-way reversing valve; 13. a first heat exchanger; 21. a second heat exchanger; 22. an inner fan; 31. a throttle member; 41. a solenoid valve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
Referring to fig. 1 and 2, an embodiment of the present application provides a refrigerant leakage protection method for an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, a second heat exchanger and an inner fan are disposed in the indoor unit, a compressor, a four-way reversing valve and a first heat exchanger are disposed in the outdoor unit, an air outlet of the compressor is communicated with the four-way reversing valve and is communicated with the first heat exchanger through the four-way reversing valve, the first heat exchanger is communicated with a second heat exchanger, a second refrigerant pipeline is communicated between the second heat exchanger and the four-way reversing valve and is communicated with a return air port of the compressor through the four-way reversing valve, a throttling element and an electromagnetic valve are disposed on the first refrigerant pipeline and the second refrigerant pipeline respectively, the refrigerant leakage protection method for the air conditioner includes:
step S10: and acquiring the refrigerant leakage concentration of the indoor unit.
Step S20: and controlling to raise the wind shield of the inner fan according to the condition that the refrigerant leakage concentration of the indoor unit is larger than or equal to a preset leakage alarm threshold value and the refrigerant leakage change rate of the indoor unit is larger than the preset threshold value.
Step S30: and according to the operation mode of the air conditioner, controlling to stop conveying the refrigerant to the first heat exchanger, and controlling the first heat exchanger to convey the refrigerant to the compressor or the second heat exchanger.
In this embodiment, the preset leak alert threshold may be any value in the range of 20% LEL to 30% LEL, for example. Wherein,% LEL (Low Explosion-Level) represents the percentage of the content of the refrigerant in the indoor unit to the Explosion lower limit thereof.
Illustratively, the rate of change of the refrigerant leakage concentration of the indoor unit may be any value in the range of 8% LEL/5s-12% LEL/5 s.
The indoor unit of the air conditioner is usually only communicated with the indoor air duct by the inner fan, so when the indoor unit leaks refrigerant, and when the change rate of the leakage concentration of the refrigerant is large, the refrigerant can not be rapidly discharged only by the inner fan, and the concentration of the leaked refrigerant in the indoor unit can continuously rise to possibly ignite or explode.
Based on this, the refrigerant leakage protection method provided by the application obtains the refrigerant leakage concentration of the indoor unit in real time, and when the refrigerant leakage concentration of the indoor unit reaches the preset leakage alarm threshold value and the change rate of the refrigerant leakage concentration is greater than the preset change threshold value, the refrigerant leakage amount of the indoor unit is larger than the refrigerant amount discharged from the indoor unit in unit time, that is, the refrigerant leakage concentration in the indoor unit rises too fast, but the rotating speed of the inner fan of the indoor unit is lower, so that the refrigerant leakage concentration of the indoor unit cannot be discharged fast.
In step S10, the refrigerant leakage concentration of the indoor unit may be detected in real time by a refrigerant sensor preset in the indoor unit. The change rate of the refrigerant leakage concentration of the indoor unit can be obtained by calculating the change amount of the refrigerant in unit time.
In step S20, the current running wind gear of the inner fan is controlled to be raised, that is, the current rotation speed of the inner fan is raised, so that the indoor speed of the refrigerant in the indoor unit can be raised, and further the concentration of the leaked refrigerant in the indoor unit is rapidly reduced. Of course, the air duct is additionally arranged in the room to be communicated with the outside, so that the purpose of discharging the refrigerant can be realized.
In step S30, on the basis of controlling and improving the running wind gear of the inner fan, the running mode of the air conditioner is obtained, according to the running mode of the air conditioner, the second heat exchanger is controlled to stop conveying the refrigerant to the second heat exchanger in the indoor unit, and the second heat exchanger is controlled to convey the refrigerant to the compressor or the first heat exchanger, so that the supply of the refrigerant to the indoor unit is stopped, the refrigerant in the indoor unit can be directly conveyed back to the compressor or conveyed to the first heat exchanger, and finally returned to the compressor, so that the concentration of the refrigerant in the indoor unit is reduced, and the risk of ignition or explosion caused when the leakage concentration of the refrigerant in the indoor unit exceeds a safety limit is reduced.
For example, when the air conditioner is in a cooling mode and the refrigerant flow direction is compressor-first heat exchanger-second heat exchanger-compressor, the first refrigerant pipeline between the first heat exchanger and the second heat exchanger is controlled to be disconnected so as to stop conveying the second heat exchanger, and the second heat exchanger is controlled to continuously convey the refrigerant to the compressor, so that the concentration of the refrigerant in the indoor unit is reduced.
For another example, the air conditioner is in a heating mode, at this time, the refrigerant flow direction is a compressor, a second heat exchanger, a first heat exchanger and a compressor, and then the compressor is controlled to stop conveying the refrigerant to the second heat exchanger, and a refrigerant pipeline between the second heat exchanger and the first heat exchanger is controlled to keep a passage, so that the refrigerant in the indoor unit can be conveyed to the outdoor unit, the refrigerant concentration of the indoor unit is reduced, and the risk of ignition or explosion caused when the refrigerant leakage concentration of the indoor unit exceeds a safety limit can be reduced.
Referring to fig. 3, according to some embodiments of the present application, according to an operation mode of an air conditioner, controlling to stop delivering refrigerant to a first heat exchanger and controlling the first heat exchanger to deliver refrigerant to a compressor or a second heat exchanger includes:
step 301: and according to the air conditioner in the refrigeration mode, controlling to close the throttling element and controlling the compressor to operate at a preset frequency.
In the present embodiment, the compressor is operated at a preset frequency, which means that the compressor is operated at a lower frequency of 25Hz, 30Hz, 35Hz, or the like, by way of example.
When a signal of the air conditioner in a refrigerating mode is obtained, a high-temperature high-pressure air refrigerant discharged by a compressor in the outdoor unit can enter the first heat exchanger for heat release condensation under the normal condition, then enters the second heat exchanger in the indoor unit after passing through the first refrigerant pipeline and the throttling piece, and therefore the throttling piece is controlled to be closed, the compressor is enabled to operate at a lower frequency, the first heat exchanger and the second heat exchanger are disconnected, the refrigerant in the first heat exchanger can not be conveyed into the second heat exchanger any more, then the compressor is utilized to operate at a preset frequency, and therefore the refrigerant in the second heat exchanger is continuously conveyed into the compressor, the concentration of the leaked refrigerant in the indoor unit is reduced rapidly, and the risk of ignition or explosion caused when the concentration of the leaked refrigerant in the indoor unit exceeds a safety limit value can be reduced.
It can be understood that when the compressor runs at a lower frequency, on one hand, the refrigerant in the second heat exchanger can be pumped back to the compressor, and on the other hand, the risk that the air conditioner starts a protection program with too high pressure due to too high pressure of the refrigerant in the second refrigerant pipeline, and then the compressor is stopped can be reduced.
Referring to fig. 4, according to some embodiments of the present application, according to an operation mode of an air conditioner, controlling to stop delivering refrigerant to a first heat exchanger and controlling the first heat exchanger to deliver refrigerant to a compressor or a second heat exchanger includes:
step S302: and acquiring the ambient temperature of the air conditioner according to whether the air conditioner is in a heating mode or a standby mode.
Step S303: and controlling the outdoor unit to switch to a refrigeration mode according to the fact that the ambient temperature of the air conditioner is greater than or equal to a preset ambient temperature threshold value, and controlling the closing of the throttling piece to control the compressor to run at a preset frequency.
In this embodiment, the preset ambient temperature threshold may be any value from 28 ° to 40 °, for example.
If the air conditioner is in the non-refrigeration mode, the ambient temperature of the outdoor unit is acquired, namely, the ambient temperature of the air conditioner is acquired, and whether the ambient temperature of the air conditioner reaches a preset ambient temperature threshold value is judged.
If the ambient temperature of the air conditioner reaches the preset ambient temperature threshold value, indicating that the ambient temperature is higher, controlling the air conditioner to switch to a refrigeration mode at the moment, controlling the closing of the throttling element, and enabling the compressor to operate at a lower frequency, so that the refrigerant in the outdoor unit is not conveyed into the indoor unit any more, and keeping the compressor to continuously pump the refrigerant in the indoor unit back into the compressor until the exhaust pressure of the compressor is lower than the preset pressure threshold value, or until the refrigerant leakage concentration of the indoor unit is lower than the preset leakage alarm threshold value.
Referring to fig. 5, according to some embodiments of the present application, the refrigerant leakage protection method further includes:
step S304: and controlling to switch the four-way reversing valve and closing the compressor according to the condition that the ambient temperature of the air conditioner is smaller than the preset ambient temperature threshold value.
In this embodiment, specifically, the four-way reversing valve has four interfaces A, B, C, D, where in the initial state, the air outlet of the compressor is connected to port a, port B is connected to the first heat exchanger, port C is connected to the second heat exchanger, and port D is connected to the gas-liquid separator.
If the ambient temperature of the air conditioner is smaller than the preset ambient temperature threshold value, the ambient temperature of the air conditioner is lower, the refrigerating operation condition of the air conditioner is not met, at the moment, the interface positions of the first heat exchanger, the second heat exchanger and the four-way reversing valve are controlled and converted, namely the port B is communicated with the second heat exchanger, the port C is communicated with the first heat exchanger, the compressor is controlled to be closed, so that the refrigerant is stopped to be conveyed to the indoor unit, the refrigerant in the indoor unit flows to the first heat exchanger in the outdoor unit through the second heat exchanger, the refrigerant of the indoor unit is discharged, and the leakage concentration of the refrigerant in the indoor unit can be reduced.
Meanwhile, in the process of converting the first heat exchanger, the second heat exchanger and the four-way reversing valve, the pressure balance of the whole system of the air conditioner is improved.
Referring to fig. 6, according to some embodiments of the present application, the refrigerant leakage protection method further includes:
step S40: and controlling to close the compressor and closing the electromagnetic valve according to the fact that the refrigerant leakage concentration of the indoor unit is reduced to be smaller than a preset leakage alarm threshold value.
In this embodiment, when the concentration of the refrigerant leaked from the indoor unit is reduced to be less than the preset leakage alarm threshold, it is indicated that the concentration of the refrigerant leaked from the indoor unit has been reduced, and the concentration of the refrigerant leaked from the indoor unit has no or low safety risk.
According to some embodiments of the application, the step of controlling the raising of the wind shield of the inner blower comprises:
and controlling the wind gear of the inner fan to be switched to the upper limit value of the wind gear.
In this embodiment, it is understood that the higher the wind shield of the inner fan is, the faster the rotation speed of the inner fan is, and the higher the discharge efficiency of the refrigerant discharged into the room by the indoor unit is.
Therefore, the rotation speed of the inner fan reaches the maximum value by switching the wind gear of the inner fan to the highest wind gear, so that the discharge efficiency of the refrigerant in the indoor unit can be further improved, the refrigerant concentration of the indoor unit is quickly reduced, and the risk of ignition or explosion caused by the fact that the refrigerant leakage concentration of the indoor unit exceeds a preset leakage alarm threshold value is quickly reduced.
Referring to fig. 7, according to some embodiments of the present application, the refrigerant leakage protection method further includes:
step S50: and obtaining the return air pressure of the compressor.
Step S60: and controlling to close the compressor and closing the electromagnetic valve according to the fact that the return air pressure of the compressor is smaller than a preset pressure value.
In the present embodiment, the preset pressure value may be any one of 0.1MPa to 0.2MPa, for example.
When the return air pressure of the compressor is lower than a preset pressure value, the fact that the amount of the refrigerant flowing to the compressor from the second heat exchanger in the indoor unit is smaller is indicated, namely the concentration of the refrigerant in the indoor unit is lower, the compressor is controlled to stop running at the moment, the electromagnetic valve is controlled to be closed, dry burning of the compressor is prevented, and meanwhile an operator can check and maintain the second refrigerant pipeline in the indoor unit and equipment for circulating the refrigerant conveniently.
The return air pressure of the compressor can be detected by a pressure sensor preset on the second refrigerant pipeline.
Otherwise, when the return air pressure of the compressor is greater than or equal to the preset pressure value, the second heat exchanger in the indoor unit is indicated to have more refrigerant flowing to the compressor, namely the refrigerant concentration in the indoor unit is still higher, at the moment, the throttling piece is kept closed, and the compressor is kept to run at the preset frequency, so that the refrigerant in the indoor unit is continuously pumped into the compressor by the compressor, and the refrigerant leakage concentration in the indoor unit is continuously reduced.
According to some embodiments of the present application, according to the fact that the change rate of the refrigerant leakage concentration of the indoor unit is smaller than a preset change threshold, the inner fan is controlled to maintain the current wind gear operation.
In this embodiment, if the rate of change of the leakage concentration of the refrigerant of the indoor unit is smaller than the preset change threshold, it is indicated that the amount of refrigerant discharged by the indoor unit is greater than the amount of leaked refrigerant in the current air-stage operation process of the indoor unit in unit time, so that the leaked refrigerant of the indoor unit can be gradually discharged by controlling the indoor unit to keep the current air-stage operation, thereby reducing the leakage concentration of the refrigerant of the indoor unit.
Referring to fig. 8, according to some embodiments of the present application, an indoor unit is provided with an air exhaust device, and after the step of controlling to raise the air shield of an inner fan according to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset leakage alarm threshold and the refrigerant leakage change rate of the indoor unit being greater than the preset threshold, the refrigerant leakage protection method of the air conditioner further includes:
step S70: and according to the fact that the air conditioner is in a refrigeration mode, the throttling element is controlled to be closed, the air exhaust device is controlled to be started, and the compressor is controlled to operate at a preset frequency.
In this embodiment, the air exhaust device is used for exhausting the air in the indoor unit to the outside, and when the leakage concentration of the refrigerant in the indoor unit reaches the preset leakage alarm threshold value, the air exhaust device is controlled to be turned on so as to rapidly exhaust the refrigerant in the indoor unit, thereby achieving the purpose of rapidly reducing the leakage concentration of the refrigerant in the indoor unit.
Referring to fig. 9, a second aspect of the present application provides a control device 200 of an air conditioner 100, including:
a memory and a processor, the memory storing a computer program which, when executed by the processor, performs the steps of the method for adjusting the damper of the air conditioner 100 according to any one of the embodiments of the first aspect.
Referring to fig. 1, a third aspect of the present application provides an air conditioner 100, which includes an indoor unit 20, an outdoor unit 10, a refrigerant sensor 50, and a control device 200 according to the second aspect of the present application.
The indoor unit 20 is provided with a second heat exchanger 21, an inner fan 22 and a refrigerant sensor 50, and the outdoor unit 10 is provided with a compressor 11, a four-way reversing valve 12 and a first heat exchanger 13 which are sequentially connected. A first refrigerant pipeline 30 is communicated between the first heat exchanger 13 and the second heat exchanger 21, a second refrigerant pipeline 40 is communicated between the second heat exchanger 21 and the four-way reversing valve 12, the second heat exchanger 21 is communicated with a return air port of the compressor 11 through the four-way reversing valve 12, and a throttling element 31 and an electromagnetic valve 41 are respectively arranged on the first refrigerant pipeline 30 and the second refrigerant pipeline 40. The control device 200 is electrically connected to the compressor 11, the four-way reversing valve 12, the inner fan 22, the throttle 31, the solenoid valve 41, and the refrigerant sensor 50, and is configured to implement the refrigerant leakage protection method of the air conditioner 100 according to any one of the first embodiment when executing a computer program.
In the present embodiment, the outdoor unit 10 and the indoor unit 20 of the air conditioner 100 may be integrally formed or may be separately formed, and when the outdoor unit 10 and the indoor unit 20 are integrally formed, a partition is provided between the outdoor unit 10 and the indoor unit 20 to separate the indoor unit 20 and the outdoor unit 10.
The outdoor unit 10 is further provided therein with a temperature sensor 60 electrically connected to the control device 200, and the temperature sensor 60 is used to detect the ambient temperature of the air conditioner 100. The second refrigerant line 40 is further provided with a pressure sensor for detecting the return air pressure of the compressor 11, and the pressure sensor is also electrically connected to the control device 200.
Further, a gas-liquid separator is disposed between the four-way reversing valve 12 and the air return port of the compressor, and the gas-liquid separator is used for separating the refrigerant flowing to the compressor 11 from the second heat exchanger 21 and delivering the gaseous refrigerant to the compressor 11.
Illustratively, the throttle member 31 may be a structural member such as an electronic expansion valve or a capillary tube for adjusting the flow rate of the refrigerant in the first refrigerant line 30.
Illustratively, the refrigerant sensor 50 is a gas concentration detection sensor.
The refrigerant sensor 50 in the indoor unit 20 detects the refrigerant leakage concentration in the indoor unit 20 in real time, and sends the detected refrigerant leakage concentration to the control device 200.
When the control device 200 receives a signal that the refrigerant leakage concentration of the indoor unit 20 is greater than the preset leakage alarm threshold, and the change rate of the refrigerant leakage concentration of the indoor unit 20 is greater than the preset change threshold, the control device 200 increases the operation gear of the inner fan 22 by controlling to increase the rotation speed of the inner fan 22, so that the refrigerant of the indoor unit 20 can be rapidly discharged from the indoor unit 20, and the refrigerant leakage concentration of the indoor unit 20 is reduced.
Meanwhile, on the basis of controlling to raise the current wind level of the inner fan 22, if the control device 200 obtains that the air conditioner 100 is in the refrigeration mode, the control device 200 controls the closing of the throttling element 31 and controls the compressor 11 to operate at a lower frequency so that the refrigerant is not conveyed into the second heat exchanger 21 any more, and continuously pumps the refrigerant in the second heat exchanger 21 into the compressor 11 by using the compressor 11 until the refrigerant leakage concentration of the indoor unit 20 is reduced to be less than a preset leakage alarm threshold value, or until the return air pressure of the compressor 11 detected by the pressure sensor is received to be less than a preset pressure value, and then controls to close the compressor 11 and close the electromagnetic valve 41.
In addition, if the control device 200 obtains that the air conditioner 100 is in the non-cooling mode, the control device 200 receives the ambient temperature of the air conditioner 100 detected by the temperature sensor 60, and if the ambient temperature reaches the preset ambient temperature, the control device 200 controls the air conditioner 100 to switch to the cooling mode, controls the execution of the step of closing the throttling element 31 and controlling the compressor 11 to operate at the preset frequency, thereby realizing the rapid reduction of the concentration of the refrigerant in the indoor unit 20, and further reducing the risk of ignition or explosion when the leakage concentration of the refrigerant in the indoor unit 20 exceeds the safety limit.
If the control device receives that the temperature sensor 60 detects that the ambient temperature of the air conditioner 100 is less than the preset ambient temperature value, the control device 200 can directly control and switch the four-way reversing valve, and close the compressor 11 to switch the flowing direction of the refrigerant, so that the refrigerant is diverted to flow from the second heat exchanger 21 to the first heat exchanger 13, and stops discharging from the compressor 11 to the second heat exchanger 21, thereby rapidly reducing the concentration of the refrigerant in the indoor unit 20, and further reducing the risk of ignition or explosion when the leakage concentration of the refrigerant in the indoor unit 20 exceeds the safety limit value.
A fourth aspect of the present application proposes a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements a refrigerant leakage protection method of an air conditioner 100 according to any one of the embodiments of the first aspect.
In the present embodiment, examples (a non-exhaustive list) of the computer-readable storage medium include the following: an electrical connection (electronic device) with one or more wires, a portable computer cartridge (magnetic device), a random access Memory (RAM, random Access Memory), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (EPROM, erasable Programmable Read-Only Memory, or flash Memory), an optical fiber device, and a portable compact disc Read-Only Memory (CDROM, compact Disc Read-Only Memory). In addition, the computer-readable storage medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, apparatus (system) or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-readable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (11)
1. The refrigerant leakage protection method of the air conditioner comprises an outdoor unit and an indoor unit, wherein a compressor, a four-way reversing valve and a first heat exchanger which are sequentially communicated are arranged in the outdoor unit, a second heat exchanger and an inner fan are arranged in the indoor unit, the first heat exchanger is communicated with the second heat exchanger through a first refrigerant pipeline, the second heat exchanger is communicated with the compressor through a second refrigerant pipeline and the four-way reversing valve, a throttling piece is arranged on the first refrigerant pipeline, and an electromagnetic valve is arranged on the second refrigerant pipeline, and the refrigerant leakage protection method comprises the following steps:
acquiring the refrigerant leakage concentration of the indoor unit;
controlling to raise the air shield of the inner fan according to the fact that the refrigerant leakage concentration of the indoor unit is larger than or equal to a preset leakage alarm threshold value and the change rate of the refrigerant leakage concentration of the indoor unit is larger than or equal to a preset change threshold value;
and controlling to stop conveying the refrigerant to the first heat exchanger according to the operation mode of the air conditioner, and controlling the first heat exchanger to convey the refrigerant to the compressor or the second heat exchanger.
2. The refrigerant leakage protection method of an air conditioner according to claim 1, wherein the step of controlling to stop the supply of the refrigerant to the first heat exchanger and controlling the first heat exchanger to supply the refrigerant to the compressor or the second heat exchanger according to the operation mode of the air conditioner comprises:
and according to the air conditioner in the refrigeration mode, controlling to close the throttling piece and controlling the compressor to operate at a preset frequency.
3. The refrigerant leakage protection method of an air conditioner according to claim 1, wherein the step of controlling to stop the supply of the refrigerant to the first heat exchanger and controlling the first heat exchanger to supply the refrigerant to the compressor or the second heat exchanger according to the operation mode of the air conditioner comprises:
acquiring the ambient temperature of the air conditioner according to whether the air conditioner is in a heating mode or a standby mode;
and controlling the outdoor unit to switch to a refrigeration mode according to the fact that the ambient temperature of the air conditioner is greater than or equal to a preset ambient temperature threshold value, and controlling the throttling piece to be closed and controlling the compressor to operate at a preset frequency.
4. The refrigerant leakage protection method of an air conditioner according to claim 3, further comprising:
and controlling to switch the four-way reversing valve and closing the compressor according to the condition that the ambient temperature of the air conditioner is smaller than the preset ambient temperature threshold value.
5. The refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 4, further comprising:
and controlling to close the compressor and closing the electromagnetic valve according to the fact that the refrigerant leakage concentration of the indoor unit is reduced to be smaller than a preset leakage alarm threshold value.
6. The refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 4, further comprising:
acquiring the return air pressure of the compressor;
and controlling to close the compressor and closing the electromagnetic valve according to the fact that the return air pressure of the compressor is smaller than a preset pressure value.
7. The refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 4, wherein the step of controlling to raise a wind shield of the inner fan comprises:
and controlling the wind gear of the inner fan to be switched to the upper limit value of the wind gear.
8. The refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 4, further comprising:
and controlling the inner fan to maintain the current wind gear operation according to the fact that the change rate of the refrigerant leakage concentration of the indoor unit is smaller than a preset change threshold value.
9. A control device of an air conditioner, comprising:
a memory and a processor, the memory being configured to be able to store a computer program which, when executed by the processor, implements the steps of the refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 8.
10. An air conditioner, comprising:
the outdoor unit is internally provided with a compressor, a four-way reversing valve and a first heat exchanger which are sequentially communicated;
the indoor unit is internally provided with a second heat exchanger and an inner fan, the first heat exchanger is communicated with the second heat exchanger through a first refrigerant pipeline, the second heat exchanger is communicated with the compressor through a second refrigerant pipeline and the four-way reversing valve, the first refrigerant pipeline is provided with a throttling piece, and the second refrigerant pipeline is provided with an electromagnetic valve;
the refrigerant sensor is arranged in the indoor unit; and
the control device of an air conditioner according to claim 9, wherein the control device is electrically connected to the compressor, the four-way switching valve, the inner fan, the throttle, the solenoid valve, and the refrigerant sensor, for implementing the refrigerant leakage protection method of an air conditioner according to any one of claims 1 to 8 when executing a computer program.
11. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and the computer program when executed by a processor implements the refrigerant leakage protection method of the air conditioner according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772460.5A CN116624972A (en) | 2023-06-27 | 2023-06-27 | Refrigerant leakage protection method and device, air conditioner and computer readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772460.5A CN116624972A (en) | 2023-06-27 | 2023-06-27 | Refrigerant leakage protection method and device, air conditioner and computer readable storage medium |
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| CN116624972A true CN116624972A (en) | 2023-08-22 |
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| CN202310772460.5A Pending CN116624972A (en) | 2023-06-27 | 2023-06-27 | Refrigerant leakage protection method and device, air conditioner and computer readable storage medium |
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| Country | Link |
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| CN (1) | CN116624972A (en) |
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- 2023-06-27 CN CN202310772460.5A patent/CN116624972A/en active Pending
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